Aerodynamic circulation heating device and roadbed thereof

Abstract

The invention provides an aerodynamic circulation heating device and a roadbed thereof, and relates to the technical field of seasonal frozen soil area engineering construction. In the design of the aerodynamic circulation heating device, one end of a solar heat absorption pipe is inserted into a heat collection box; a convection heat exchange pipe is arranged in the heat collection box and the solar heat absorption pipe, a first flow channel is formed in the convection heat exchange pipe, a second flow channel is formed by the outer wall of the convection heat exchange pipe and the outer walls of the heat collection box and the solar heat absorption pipe, and the first flow channel communicates with the second flow channel and is filled with air; a convection power element is installed in the first flow channel and used for pushing air to flow in the first flow channel and the second flow channel; and the heat absorbing section of a heat gathering pipe is inserted into the heat collection box, and a heat releasing section of the heat gathering pipe is inserted into the roadbed. According to the aerodynamic circulation heating device and the roadbed thereof, solar energy resources can be utilized, and engineering diseases such as frost heaving and non-uniform fluctuation of the roadbed in the seasonal frozen soil region can be effectively avoided through flat heating of the roadbed temperature field and key regulation and control of the easily-frost-heaving part of the roadbed.

Description

technical field [0001] The invention relates to the technical field of engineering construction in seasonally frozen soil regions, in particular to an aerodynamic cycle heating device and a roadbed thereof. Background technique [0002] The Xige section of the Qinghai-Tibet Railway is located in the northeast of the Qinghai-Tibet Plateau. The railway line passes through the coastal plain, alluvial plain, and ice sheet platform on the northern shore of Qinghai Lake. The average altitude is 3220m, and the average annual precipitation is 376mm. The precipitation is unevenly distributed, and most of it is concentrated in July-September , the annual average temperature is -0.6°C, and the average temperature in January, the coldest month, is -20.6°C. The Xige section of the Qinghai-Tibet Railway has a cold climate, strong freezing ability, and a relatively large freezing depth. The maximum freezing depth can reach 1.8m. It belongs to a typical seasonal frozen soil area. Engineerin...

AI Technical Summary

Problems solved by technology

However, there is still a lack of research on the development characteristics and distribution of freeze-thaw engineering diseases under special conditions such as high water level, coarse fill, and strong freeze-thaw in the Xige section of Qinghai-Tibet Railway.

Coarse particle replacement, chemical grouting, waterproof curtain and other methods used in conventional areas are limited by engineering conditions such as normal train running and uninterrupted construction, as well as disposal caused by strong freezing and thawing of soil. Partial cracking and the overall closure of the lower part of the subgrade are extremely difficult, which makes it difficult for these methods to meet the actual engineering needs.

Due to the weak previous research on engineering measures for this type of engineering disease remediation, engineering problems have long affected the stability of the subgrade and operational safety

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